Stadium: Court 3 Round: 25 Ground: Hardcourt indoor
| Challenger Lille Qual | 2018/03/19 12:30 | Laurynas Grigelis v Guillermo Olaso | 1-6,2-6 |
| Challenger Lille Qual | 2018/03/18 15:55 | Guillermo Olaso v Daniel Masur | 4-6,7-5,6-2 |
| Challenger Lille Qual | 2018/03/17 12:20 | Moez Echargui v Guillermo Olaso | 2-6,6-7 |
| ITF Egypt F8 | 2018/03/09 08:00 | Dejan Katic v Guillermo Olaso | 6-4,6-2 |
| ITF Egypt F8 | 2018/03/08 08:00 | Patrik Nema v Guillermo Olaso | 2-6,3-6 |
| ITF Egypt F8 | 2018/03/06 08:00 | Louis Wessels v Guillermo Olaso | 2-6,6-3,6-7 |
| Challenger San Francisco Qual | 2018/02/04 21:00 | Guillermo Olaso v Jack Molloy | 7-5,6-2 |
| Challenger San Francisco Qual | 2018/02/03 21:55 | Guillermo Olaso v Jacob Brumm | 6-3,6-1 |
| ITF Israel F1 | 2018/03/08 08:00 | Yannick Mertens v Gianluca Mager | 7-5,6-3 |
| ITF Israel F1 | 2018/03/07 09:40 | Yannick Mertens v Nicolas Ferrando | 6-2,6-2 |
| ITF Israel F1 | 2018/03/06 11:35 | Yannick Mertens v Patrik Niklas-Salminen | 6-3,6-3 |
| ITF Portugal F1 | 2018/02/24 13:05 | Yannick Mertens v Tiago Cacao | 3-6,6-4,4-6 |
| ITF Portugal F1 | 2018/02/23 11:25 | Yannick Mertens v Igor Marcondes | 3-6,6-4,6-1 |
| ITF Portugal F1 | 2018/02/22 15:05 | Yannick Mertens v Jaime Fermosell | 7-5,6-2 |
| ITF Portugal F1 | 2018/02/20 11:45 | Yannick Mertens v Fernando Bogajo | 7-6,6-1 |
| ITF Great Britain F3 | 2018/02/13 12:15 | Evan Furness v Yannick Mertens | 4-6,7-5,6-4 |